CNE part 1

Run command "ping 10.0.0.2", which of the following result shows the host 10.0.0.2 is reachable?

• Reply from 10.0.0.2: bytes=32 time<1ms TTL=64

• IP Address . . . . . . . . . : 10.0.0.2

• TCP localhost:4078 10.0.0.2:80 ESTABLISHED

• Default Gateway . . . . . . . . . : 10.0.0.2

Which of the following systems provides circuit switching service?

• telephone system

• postal system

Which of the following tools is a security scanner used to discover computers and services on a computer network?

• nmap

• ping

• netstat

• tracert

Which of the following devices is more secure in term of network sniffing?

• Switch

• Hub

If you ping fit.hanu.vn first time, where is the first place that your computer send the request?

• DNS server

• Web server

• DHCP server

• Application server

What is the first byte range of a class B network address?

• 128 --> 191

• 0 --> 127

• 1 --> 126

• 192 --> 223

Which of the following commands on Linux is used to test reachability of a remote host and show (the part of) the list of intermediary hops?

• traceroute

• tracert

• ping

• nmap

Which of the following device is mainly designed to work at Data link layer?

• Switch

• Router

• Bridge

• Hub

How far can a twisted pair cable be extended?

• 100m

• 5km

• 50km

• 500km

A distributed network configuration in which all data/information pass through a central computer is...

• star network

• Point-to-point network

• bus network

• ring network